Yongnuo YN-560 IV Flash Speedlite for Canon Nikon Pentax Olympus DSLR Cameras With EACHSHOT Diffuser Supports Wireless Master Function Supports Wireless Slave Function, fully supports YN560-TX, RF-603, RF-602 Wireless transmitter Multiple Trigger Synchronous Mode Supported Settings Save Automatically, Supports Custom Settings (Fn) Package includes EACHSHOT diffuser